Edited by Sergio Carrera, Professor, Migration Policy Centre (MPC), European University Institute (EUI), Florence, Italy, Senior Research Fellow and Head of Justice and Home Affairs Programme, CEPS, Visiting Professor, Paris School of International Affairs (PSIA), Sciences Po, France, Associate Professor, Faculty of Law in Maastricht University, the Netherlands and Honorary Industry Professor, School of Law, Queen Mary University of London, UK, Juan Santos Vara, Professor of Public International Law and European Law, Jean Monnet Chair in EU External Action, University of Salamanca, Spain and Tineke Strik, Associate Professor Migration Law, Centre for Migration Law, Radboud University, the Netherlands and member of the Parliamentary Assembly of the Council of Europe